A Patient infected with MRSA needs Dialysis. The physician had already been staed the patient on linezolid. On the day of undergoing dialysis, when to administer linezolid in this patient :
**Core Concept**
Linezolid is an oxazolidinone antibiotic that inhibits protein synthesis by binding to the 50S ribosomal subunit of bacteria. In patients undergoing dialysis, the timing of antibiotic administration is crucial to prevent breakthrough infections.
**Why the Correct Answer is Right**
Linezolid is primarily excreted unchanged in the urine. In patients undergoing hemodialysis, the antibiotic's plasma concentration can decrease significantly due to the dialysis process, potentially leading to breakthrough infections. To maintain adequate plasma concentrations, linezolid should be administered after the dialysis session, typically 2-3 hours after the completion of dialysis.
**Why Each Wrong Option is Incorrect**
**Option A:** Administering linezolid before dialysis may lead to decreased plasma concentrations due to the dialysis process, compromising the effectiveness of the antibiotic.
**Option B:** Administering linezolid during dialysis may not provide adequate plasma concentrations, as the antibiotic is primarily excreted unchanged in the urine.
**Option C:** Administering linezolid at the same time as dialysis may lead to decreased plasma concentrations due to the dialysis process, compromising the effectiveness of the antibiotic.
**Clinical Pearl / High-Yield Fact**
To maintain adequate plasma concentrations of linezolid in patients undergoing hemodialysis, it is essential to administer the antibiotic after the dialysis session, typically 2-3 hours after completion.
**Correct Answer:** C.